Cisco Router turned into Port Forwarding Temp Verizon Mifi

HERE IS A SCRIPT YOU CAN USE TO:

1.) Turn your Cisco router that is currently ROUTING and NATTING and doing all kinds of professional stuff with 16 ips into....
2.) A Router that gets ONE public IP ADDRESS and port-forwards for IMAP, port 80, etc for a temporary solution.

Note: This script will just wipe out your current config so no need to save it! Just reboot when your main connection comes back up and you should have your production (original) config right there ready to go.

NOTE: I'm turning "off" some stuff I had set. You may not need to do this.

NOTE: I'm assuming this "mifi setup as a BRIDGE (you do that in the mifi setup from your computer) is plugged into the WAN PORT of the Cisco router which is FastEthernet 0/0. I also have several VLANS setup because I'm running a Cisco switch with VLANS. 1924 maybe? Doesn't really matter for this solution, just noting why you'll see interfaces like 1.4, 1.5, etc. Those are VLANS that all are on FastEthernet 0/1. See like 0/1.4 is VLAN interface 4 on FastEthernet 0/1.

NOTE: Where you see like "1.1.1.52" below is my say...web server. I just changed the IPs so I wasn't posting them here. Just put in yours or remove where you don't have the need.

=====START
config t
interface FastEthernet0/0

 no ip mtu 1492
 no  ip tcp adjust-mss 1452
 no ip mroute-cache
 duplex auto
 speed auto
 ntp disable
 no pppoe enable
 no pppoe-client dial-pool-number 1
 no cdp enable
  service-policy output VOICE
ip address dhcp
 ip nat outside

exit

interface FastEthernet0/1.4
ip nat inside
shut
no shut
exit


no ip nat pool thenatpool MYPRODUCTIONNATTEDIP MYPRODUCTIONNATTEDIP netmask 255.255.255.240
no ip nat inside source route-map nat-allow pool thenatpool overload
ip nat inside source route-map nat-allow pool thenatpool2 overload
no ip http server
no ip http secure-server
ip classless
no ip route 0.0.0.0 0.0.0.0 Dialer1
ip nat pool thenatpool2 NEWIPADDRESSASSIGNEDBYTHEMIFI NEWIPADDRESSASSIGNEDBYTHEMIFI  netmask SUBNETMASKOFTHATIP
ip nat inside source static tcp 1.1.1.56 7071 interface FastEthernet0/0 7071
ip nat inside source static tcp 1.1.1.56 389 interface FastEthernet0/0 389
ip nat inside source static tcp 1.1.1.56 993 interface FastEthernet0/0 993
ip nat inside source static tcp 1.1.1.56 995 interface FastEthernet0/0 995
ip nat inside source static tcp 1.1.1.56 465 interface FastEthernet0/0 465
ip nat inside source static tcp 1.1.1.52 443 interface FastEthernet0/0 443
ip nat inside source static tcp 1.1.1.52 80 interface FastEthernet0/0 80
ip nat inside source static udp 1.1.1.56 25 interface FastEthernet0/0 25
ip nat inside source static tcp 1.1.1.56 25 interface FastEthernet0/0 25
ip nat inside source route-map nat-allow pool thenatpool overload
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0


no ip access-list extended nat-permit

ip access-list extended nat-permit
 deny   ip 10.0.0.0 0.255.255.255 10.0.0.0 0.255.255.255
 permit ip 10.1.32.0 0.0.0.255 any
 permit ip 10.1.33.0 0.0.0.255 any
 permit ip 10.1.41.0 0.0.0.255 any
 permit ip 10.1.72.0 0.0.0.3 any
 permit ip 1.1.1.48 0.0.0.15 any
 exit
int fastethernet 0/0
shut
no shut





=====END








Keywords: Global Capacity, MegaPath, Covad, Verizon MiFi, temporary, port-fowarding solution, cisco 2621, router